Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Electrochemical properties of theCaNi4.8M0.2(MMg, Zn, and Mn) mechanical milling alloys used as anode materials in nickel‐metal hydride batteries

“…During milling, there was an amorphization phenomenon that increased until 40 h of milling and, then, turned into crystallization. On the other hand, the electrochemical study indicated that the best property and the highest discharge capacity were obtained at 40-milling time and an electrolyte concentration of 6 M. [71][72][73] Based on this extensive study of CaNi 4.8 Mn 0.2 (2,10,20,30,40,50, and 60 h), we will make a comparative study of CaNi 4.8 M 0.2 where M will be replaced by Mg, Zn, and Mn metals while keeping the same optimized parameters: milling time of 40 h, a ball to powder weight ratio equal to 8:1 and electrolyte concentration of 6 M. This manuscript presents a structural, morphological, and electrochemical characterization to examine the effect of CaNi 5 substitution by different metals Mg, Zn, and Mn. The electrochemical characterization methods applied in this study are galvanostatic polarization and potentiodynamic polarization.…”

“…[42][43][44] Several studies showed that the partial substitution of position B, which is in most cases nickel, affects remarkably the discharge capacity and cyclic stability of electrodes. 45,46 In the literature, various monosubstitutions (e.g., Al, 47 Cu, 48 Mn, 49 Zn, 50 Co, 51 Fe, 52 Sn, 53 and Rh) were studied. 54 For example, Merzouki et It was also noticed that the tri-substituted compound LaNi 3.55 Mn 0.4 Al 0.3 Co 0.75 had the best stability for 1000 cycles.…”

Tb2–x Nd x Zn17–y Ni y (x = 0.5, y = 4.83): a new intermetallic with a maximum disordered structure and its hydrogen storage properties

“…Currently, electrodes for nickel-metal hydride (NiMH) batteries and materials for hydrogen storage equipment are based on intermetallic compounds. Actually, binary compounds of composition RT 5 (where R is a rare earth element or Zr and T is a 3d transition metal) are still particularly attractive (Schlapbach, 1992;Besenhard, 1999;Sakintuna et al, 2007;Dymek et al, 2015;Giza et al, 2001). The RT 5 phases with rare earth elements crystallize in the hexagonal CaCu 5 structure type.…”